EP0175594A2 - Zündverteiler für Brennkraftmaschine - Google Patents

Zündverteiler für Brennkraftmaschine Download PDF

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Publication number
EP0175594A2
EP0175594A2 EP85306748A EP85306748A EP0175594A2 EP 0175594 A2 EP0175594 A2 EP 0175594A2 EP 85306748 A EP85306748 A EP 85306748A EP 85306748 A EP85306748 A EP 85306748A EP 0175594 A2 EP0175594 A2 EP 0175594A2
Authority
EP
European Patent Office
Prior art keywords
dielectric material
distributor
electrode
internal combustion
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85306748A
Other languages
English (en)
French (fr)
Other versions
EP0175594A3 (en
EP0175594B1 (de
Inventor
Yutaka C/O Himeji Works Ohashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0175594A2 publication Critical patent/EP0175594A2/de
Publication of EP0175594A3 publication Critical patent/EP0175594A3/en
Application granted granted Critical
Publication of EP0175594B1 publication Critical patent/EP0175594B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/022—Details of the distributor rotor or electrode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/025—Mechanical distributors with noise suppression means specially adapted for the distributor

Definitions

  • This invention relates to a distributor for an internal combustion engine, and in particular to a distributor for suppressing radio frequency interference or radio noise (hereinafter referred to as RFI) which is generated between a rotor electrode and a lateral terminal electrode forming the distributor in the ignition system of an internal combustion engine.
  • RFI radio frequency interference or radio noise
  • FIG. 1 A distributor rotor electrode 10 which is molded in a distributor rotor 11 faces a lateral terminal electrode 12 through a discharging gap "g".
  • Fig. 1 only shows a single lateral terminal electrode 12, but actually the distributor has a plurality of lateral terminal electrodes corresponding to the number of cylinders of an engine (not shown).
  • a contact electrode 14 makes contact with the rotor electrode 10 and supplies a high voltage from an ignition coil (not shown) to the rotor electrode 10 through a secondary high-tension cable 16.
  • the contact electrode 14 is pressed, with a spring 18, against the rotor electrode 10 rotated by a rotary axle 20 interconnected to the crank-shaft of an internal combustion engine.
  • a dielectric material 22 mainly composed of silicon is coated entirely on the discharging end, i.e. the periphery end of the rotor electrode 10.
  • the dielectric material 22 serves to increase the emission of electrons from the rotor electrode 10 towards the lateral terminal electrode 12 to start a discharge at a voltage lower than a usual breakdown voltage in the discharge gap "g". This reduction of the breakdown voltage in the discharge gap suppresses the generation of the RFI.
  • this invention improves a distributor for an internal combustion engine having a rotor electrode rotating together with the rotary axle of the engine, a plurality of lateral terminal electrodes disposed through a discharge gap in the rotating locus of the rotor electrode, and a contact electrode which makes contact with the rotor electrode for supplying a high voltage to the rotor electrode.
  • This rotor electrode has disposed thereon a wire net and a dielectric material provided inbetween the meshes of the wire net on the surface of the rotor electrode which the contact electrode makes contact with and/or the back of the surface thereof.
  • this invention provides a novel method of making a rotor electrode of a distributor for an internal combustion engine. First of all a liquid dielectric material is coated on at least one of both surfaces of an electrode member in the form of a plate. Then, a wire net is disposed on said dielectric material on said coated electrode member. Then, the resultant whole unit is heated to solidify the dielectric material. Finally, the whole unit is pressed to make the rotor electrode.
  • the dielectric material is held sectioned into the meshes of the wire net.
  • the wire net also forms a part of a discharge electrode through the discharge gap and is held by the dielectric material over the entire wire net, so that the area contacting between the discharge electrode and the dielectric material is increased to reduce the breakdown voltage of the dielectric material.
  • a distributor for an internal combustion engine will now be described with reference to Figs. 2 and 3.
  • a wire net 30 made of brass and having 40 to 200 meshes per inch is adhered to the back of the surface of the rotor electrode 10, which contacts the contact electrode 14, by means of a dielectric material 32 (Fig. 3) mainly composed of silicon.
  • the dielectric material 32 which is in liquid state at this stage is thinly coated with the thickness of 50-700 microns on an electrode member 40 in the form of a plate or sheet of electrode metal (shown by dotted lines).
  • the wire net 30 is then disposed on the liquid dielectric material 32 on the plate 40.
  • the resultant whole unit is then heated to solidify the liquid dielectric material 32, whereby the wire net 30 and the dielectric material 32 which is now solid are fixedly adhered to the plate 40.
  • one or more electrodes 10 are pressed or punched out of the plate 40 with the net 30 and dielectric 32 bonded on it, e.g. using dies of appropriate shape corresponding to the shape of the rotor electrode 10 as shown in Fig.
  • the wire net 30 Owing to the fact that the wire net 30 is adhered to or makes contact with the entire surface of the rotor electrode 10 by means of the dielectric material 32 mainly composed of silicon as shown in Fig. 3, the wire net 30 forms a part of the discnarging electrode including the rotor electrode 10, to increase the area contacting between the dielectric material 32 and the discharging electrode. Also, the silicon component composing the dielectric material 32 greatly contributes to reduce the breakdown voltage across the discharge gap "g".
  • the dielectric material 32 is divided or sectioned into the respective meshes of the wire net 30, so that it is merely exfoliated at each mesh, whereby the exfoliation or peeling of the dielectric material 32 from the rotor electrode 10 are prevented. Therefore, the effect of suppressing the RFI is retained for long periods of time.
  • the dielectric material 32 mainly composed of silicon and the wire net 30 made of brass, which characteristically bonds well with the dielectric material 32, are employed, the dielectric material 3.2 is stiffly supported with the wire net 30 so that the dielectric material 32 is difficult to exfoliate.
  • the wire net 30 of a single layer is adhered to the back surface of the rotor electrode 10 which the contact electrode 14 makes contact with by means of the dielectric material 32 mainly composed of silicon
  • the wire net 30 may be effectively adhered to only the surface contacting the contact electrode 14 or both of the surfaces.
  • the wire net 30 may be effectively formed of a plurality of layers.
  • the dielectric material 32 may be mainly composed of silicon
  • the dielectric material 32 may be mainly composed of silicon carbide (SiC), or aluminum oxide (Al 2 O 3 ) instead of silicon.
  • the wire net 30 may be made of bronze.
  • a distributor for suppressing the RFI of an internal combustion engine in which a dielectric material is adhered on the surface of the rotor electrode which the contact electrode makes contact with and/or the back of the surface thereof. Consequently, the absolute amount of the dielectric material at the discharging end of the rotor electrode can be reduced while the area contacting between the dielectric material and the discharging electrode is increased, so that this distributor for an internal combustion engine generates little intermittent discharges and therefore provides an excellent durability and a sufficient RFI suppressing effect while it is cheap and suitable for mass-production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP85306748A 1984-09-21 1985-09-23 Zündverteiler für Brennkraftmaschine Expired EP0175594B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59199033A JPS6176764A (ja) 1984-09-21 1984-09-21 内燃機関の雑音電波抑止用配電器
JP199033/84 1984-09-21

Publications (3)

Publication Number Publication Date
EP0175594A2 true EP0175594A2 (de) 1986-03-26
EP0175594A3 EP0175594A3 (en) 1987-04-15
EP0175594B1 EP0175594B1 (de) 1990-08-16

Family

ID=16400995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85306748A Expired EP0175594B1 (de) 1984-09-21 1985-09-23 Zündverteiler für Brennkraftmaschine

Country Status (4)

Country Link
US (1) US4631369A (de)
EP (1) EP0175594B1 (de)
JP (1) JPS6176764A (de)
DE (1) DE3579205D1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807791A1 (de) * 1987-02-20 1988-09-22 Mitsubishi Electric Corp Zuendverteiler fuer einen verbrennungsmotor
JPS63146170U (de) * 1987-03-13 1988-09-27
US4926013A (en) * 1987-09-16 1990-05-15 Mitsubishi Denki Kabushiki Kaisha Distributor cap with molded cable terminals
KR960000440B1 (ko) * 1989-05-15 1996-01-06 미쓰비시덴키 가부시키가이샤 내연기관용 배전기 및 그 제조방법
JP2762673B2 (ja) * 1990-04-13 1998-06-04 三菱電機株式会社 デイストリビュータ
JP2857556B2 (ja) * 1993-02-10 1999-02-17 株式会社日立製作所 内燃機関点火用配電器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766338A (en) * 1954-05-11 1956-10-09 William F Jamieson Dwell rotor for a distributor
GB1104179A (en) * 1965-08-11 1968-02-21 Lucas Industries Ltd Rotor arms for ignition distributors
JPS5438447A (en) * 1977-09-02 1979-03-23 Hitachi Ltd Distributor for internal combustion engine
JPS5450735A (en) * 1977-09-30 1979-04-20 Toyota Motor Corp Noise wave preventive surface treatment for distributor
US4166201A (en) * 1978-01-09 1979-08-28 General Motors Corporation Ignition distributor electrode for suppressing radio frequency interference
FR2435612A2 (fr) * 1978-09-09 1980-04-04 Bosch Gmbh Robert Dispositif pour la distribution de la tension d'allumage dans des installations d'allumage destinees a des moteurs a combustion interne
DE2949573C2 (de) * 1978-12-11 1982-06-03 Hitachi, Ltd., Tokyo Zündverteiler
EP0045052B1 (de) * 1980-07-25 1986-02-26 Nissan Motor Co., Ltd. Radiofrequenzinterferenz unterdrückender Rotor eines Zündverteilers
JPS605787B2 (ja) * 1981-02-24 1985-02-14 日立化成工業株式会社 雑音電波抑止型配電器の製造方法
DE3136745A1 (de) * 1981-09-16 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur zuendspannungsverteilung in fuer brennkraftmaschinen bestimmten zuendanlagen
JPH063179B2 (ja) * 1984-05-10 1994-01-12 日立化成工業株式会社 雑音電波抑制型配電器

Also Published As

Publication number Publication date
US4631369A (en) 1986-12-23
JPS6176764A (ja) 1986-04-19
EP0175594A3 (en) 1987-04-15
EP0175594B1 (de) 1990-08-16
DE3579205D1 (de) 1990-09-20

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